What is lake-effect snow?

Snow that forms when cold air crosses the open, relatively warm water of the Great Lakes and builds narrow bands that can drop 2 to 3 inches per hour or more. The National Weather Service notes that heavy snow can fall in one spot while the sun shines a mile or two away.

Where does lake-effect snow hit on I-81?

Most often in northern Oswego County around Pulaski and in southern Jefferson County south of Watertown, where Lake Ontario bands come ashore toward the Tug Hill Plateau. The band moves with the wind; NWS Buffalo has described bands moving north along the I-81 corridor to near Adams, just south of Watertown, in a single afternoon.

Where do I check I-81 closures?

511NY, run by the New York State DOT, shows closures, incidents and cameras on I-81. This page adds the hourly forecast at each stretch and active alerts from NWS Buffalo and Binghamton.

I-81 · NY

I-81 from Syracuse to Watertown: road conditions right now

Syracuse, NY to Watertown, NY

I-81 runs north from Syracuse through Oswego County past Central Square and Pulaski to Watertown, along the western edge of the Tug Hill Plateau east of Lake Ontario. NWS Buffalo storm summaries regularly describe Lake Ontario snow bands sitting over the I-81 corridor in Oswego and Jefferson counties.

Plan this drive for your departure time

Conditions at Wed, 3:02 AM EST

Highest risk along I-81: 1 of 5 (low), departing at that time.

No active NWS alerts on this route.

The road authority linked below has the final word on closures and chain requirements.

Right now: LOW riskdeparting Wed, 4:00 AM EST from Syracuse, NY

Clear driving for the whole 1 h 8 min.

Conditions: Clear

Plan this drive with your own departure timeChecked Wed, 3:02 AM EST. Updates hourly.

Checkpoints along I-81

Where	You pass	Weather	Risk	Why
Syracuse, NY	Wed 4:00 AM	57°F	low	Nothing flagged
Pulaski, NY	Wed 4:30 AM	53°F	low	Nothing flagged
Watertown, NY	Wed 5:00 AM – 5:07 AM	56°F	low	Nothing flagged

Why this stretch is hard in winter

NWS Buffalo forecasts Oswego and Jefferson counties, where the Lake Ontario bands hit; NWS Binghamton forecasts Syracuse and Onondaga County. A Lake Effect Snow Warning can cover the north end while Syracuse has none.
Whiteouts in lake-effect snow on I-81 caused a 35-car pileup in southern Jefferson County on February 6, 2015, according to NWS Buffalo.
On February 1, 2023, at least 12 vehicles, including 4 tractor-trailers, were involved in a pileup on I-81 near Watertown during a lake-effect storm (NWS Buffalo).
In January 2026 a heavy band stayed over I-81 and the Tug Hill region; the interstate stayed open, but several cars slid off the road (NWS Buffalo).

What this page checks

Hourly forecast at every checkpoint for the time you would be there: temperature, precipitation type and rate, gusts, visibility.
Active National Weather Service watches, warnings, and advisories on the route.
Snow on the ground (NOAA SNODAS) and the Weather Prediction Center winter impact outlook.
Pavement temperature and surface state from state DOT road sensors, when you are leaving within a few hours.
Chain controls, closures, and winter road condition reports from state DOT feeds where they are published openly.
Seasonal closures of mountain roads the router might otherwise use.

Official sources for this corridor

Questions drivers ask about I-81

What is lake-effect snow?: Snow that forms when cold air crosses the open, relatively warm water of the Great Lakes and builds narrow bands that can drop 2 to 3 inches per hour or more. The National Weather Service notes that heavy snow can fall in one spot while the sun shines a mile or two away.
Where does lake-effect snow hit on I-81?: Most often in northern Oswego County around Pulaski and in southern Jefferson County south of Watertown, where Lake Ontario bands come ashore toward the Tug Hill Plateau. The band moves with the wind; NWS Buffalo has described bands moving north along the I-81 corridor to near Adams, just south of Watertown, in a single afternoon.
Where do I check I-81 closures?: 511NY, run by the New York State DOT, shows closures, incidents and cameras on I-81. This page adds the hourly forecast at each stretch and active alerts from NWS Buffalo and Binghamton.

Conditions change by the hour. This page is a planning aid built on public forecasts and DOT feeds; the road authority linked above has the final word on closures and chain requirements.

Nearby corridors: I-90 (Thruway) from Buffalo to Albany · I-81 from Harrisburg to Syracuse · I-90 from Erie to Buffalo · I-95 from New York to Boston · I-80 across Pennsylvania · I-94 from Chicago to Detroit · all corridors